Journal
IEEE PHOTONICS TECHNOLOGY LETTERS
Volume 27, Issue 11, Pages 1197-1199Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/LPT.2015.2414791
Keywords
Silicon; infrared sensors; optical waveguides
Funding
- Engineering and Physical Sciences Research Council [EP/L01162X/1]
- Royal Society [UF120053]
- Royal Society [UF120053] Funding Source: Royal Society
- Engineering and Physical Sciences Research Council [1238894, EP/L01162X/1] Funding Source: researchfish
- EPSRC [EP/L01162X/1] Funding Source: UKRI
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Mid-infrared sensing is a field that has recently attracted attention due to the potential to reach the finger-print region for several chemical compounds, allowing enhanced sensitivity. To further enhance the sensitivity of photonic sensors slot waveguides can be used as waveguides as the electric field amplitude can be greatly increased in the gap region. In this letter, we present silicon on insulator slot waveguides with a 1.4 +/- 0.2 dB/cm propagation loss at 3.8 mu m wavelength, as well as strip to slot transitions with a loss of 0.09 +/- 0.01 dB/transition and slot bends with a loss of 0.18 dB/bend.
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